I've never understood this bundling. I listen to a lot of podcasts and a lot of music. I always know what I want to listen to. I don't need or want podcasts cluttering up my music app when I'm trying to play or discover music. I don't need or want music cluttering up my podcasts when I am trying work through my infinitely long podcast queue. It's never the case that I'm looking for _either_ a podcast or music to fill the silence.

Different use cases. Different audio mediums. Different apps.

As they say, those who don't understand / learn from history are doomed to repeat it. Apple learned that having them separate was more beneficial, a lesson Google and Spotify have not.